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|
Abnormal operating
conditions |
General |
Environmental
conditions
that
are
unfavorable,
harmful,
or
detrimental
to or
for
the
operation
of a
crane,
such
as
excessively
high
or
low
ambient
temperatures,
exposure
to
adverse
weather,
corrosive
fumes,
dust-laden
or
moisture-laden
atmospheres,
and
hazardous
locations.
(ASME
B30.2-1990) |
|
Access platform |
Overhead
Crane |
A
limited
length
platform,
located
on
the
idler
girder
to
access
to
the
endtruck
wheels
only. |
|
Adjustable or
variable
voltage |
Bridge
Crane
Control |
A
method
of
Bridge
Crane
Control
by
which
the
motor
supply
voltage
can
be
adjusted.
(CMAA
Spec.
70) |
|
Administrative or
regulatory
authority |
Regulatory |
Governmental
agency
or,
in
the
absence
of
governmental
jurisdiction,
the
employer.
(ASME
B30.2-1990) |
|
Ambient temperature |
General |
The
temperature
of
the
atmosphere
surrounding
the
hoist.
(ASME
HST-4M-1991) |
|
Ampacity |
Bridge
Crane
Bridge
Crane
Electrical |
The
current
carrying
capacity
expressed
in
amperes.
(ANSI
MH
27.1-1981) |
|
Appointed |
Regulatory |
Assigned
specific
responsibilities
by
the
employer
or
the
employer’s
representative.
(ASME
B30-17) |
|
Authorized |
Regulatory |
Appointed
by a
duly
constituted
administrative
or
regulatory
authority. (ASME
B30-17) |
|
Automatic crane |
Overhead
Crane |
A
crane
which
when
activated
operates
through
a
preset
cycle
or
cycles.
(ANSI
MH
27.1-1981) |
|
Automatic dispatch
carrier |
Monorail |
A
carrier
which
when
activated
operates
through
a
preset
cycle
or
cycles.
(ANSI
MH
27.1-1981) |
|
Auxiliary hoist |
Hoist |
A
supplemental
hoisting
unit,
usually
designed
to
handle
lighter
loads
at a
higher
sped
than
the
main
host.
(CMAA
Spec.
70) |
|
Axle, fixed |
Drive |
A
shaft
which
is
fixed
in
the
end
truck
and
about
which
the
wheel
revolves.
(WCH) |
|
Axle, rotating |
Drive |
A
shaft
which
is
fixed
in
the
wheel
and
which
rotates
on
bearings
fixed
in
the
end
truck.
(WCH) |
|
B-10 bearing life |
General |
The
B-lO
bearing
life
of an
anti-friction
bearing
is
the
minimum
expected
life,
in
hours,
of
9O~7o
of a
group
of
bearings
which
are
operated
at a
given
speed
and
loading.
(ANSI
MH
27.1-1981) |
|
Base or deck
mounted
(hoist) |
Hoist |
A
type
of
mounting
where
the
hoist
is
mounted
to
the
top
side
of a
horizontal
supporting
surface.
(ASME
HST-4M-1991) |
|
Battery system
(backup) |
Below
Hook
Device |
Batteries
used
to
guard
against
inadvertent
load
release
due
to
loss
of
primary
power
to
magnet
system.
(ASME
B30.20-1985) |
|
Beam |
Overhead
Crane
&
Hoist |
An
overhead
standard
structural
or
specially
fabricated
shape
on
which
the
trolley
operates.
(ASME
HST-4M-1991) |
|
Bearing life |
General |
The
L-10
life
of an
anti-friction
bearing
is
the
minimum
expected
life,
hours,
of 90
percent
of a
group
of
bearings
which
are
operating-at
a
given
speed
and
loading.
The
average
expected
life
of
the
bearings
is
approximately
five
times
the
L-10
life.
(CMAA
Spec.
70) |
|
Bearing, lifetime
lubricated |
General |
An
antifriction
bearing
which
is
provided
with
seals
and a
high-stability
oxidation-resistant
grease
to
permit
operation
of
the
bearing
without
re-lubrication
for
not
less
than
the
specified
B-10
life. |
|
Below the hook
device |
|
|
|
BHN |
General |
Brinell
hardness
number,
measurement
of
material
hardness.
(CMAA
Spec.
70) |
|
Block, load |
Hoist |
The
assembly
of
hook,
swivel,
bearings,
sheaves,
pins
and
frame
suspended
from
the
hoisting
ropes.
In a
“short
type”
block,
the
hook
and
the
sheaves
are
mounted
on
the
same
member,
called
the
swivel.
In a
“long
type”
block,
the
hook
and
the
sheaves
are
mounted
on
separate
members.
(The
supporting
member
for
the
sheaves
is
called
the
sheave
pin
and
the
supporting
member
for
the
hook
is
called
the
trunnion.
(WCH) |
|
Block, upper |
Hoist |
A
fixed
assembly
of
sheaves,
bearings,
pins
and
frame,
located
on
the
trolley
cross
members,
and
which
supports
the
load
block
and
its
load
by
means
of
the
ropes.
(WCH) |
|
Bogie |
Overhead
Crane |
A
short
end
truck
attached
to
the
end
of
one
girder
(or
to a
connecting
member
if
more
than
one
bogie
is
used
per
girder).
This
type
of
end
truck
is
used
when
more
than
four
wheels
are
required
on a
crane
due
to
the
design
of
the
runway.
(WCH) |
|
Bogie, equalizing |
Hoist |
A
short
end
truck
which
is
flexibly
connected
to
one
girder
(or
connecting
member)
by
means
of a
pin
upon
which
the
truck
can
oscillate
to
equalize
the
loading
on
the
two
truck
wheels.
This
construction
uses
a
very
rigid
end
tie
between
the
girders.
(WCH) |
|
Bogie, fixed |
Overhead
Crane |
A
short
end
truck
which
is
rigidly
connected
to
one
girder.
A
flexible
end
tie
is
used
between
the
girders
to
permit
equalization
of
the
wheel
loads
by
torsional
deflection
of
the
girders
and
flexing
of
the
end
tie.
(WCH) |
|
Boom (of gantry
cranes)
|
Overhead
Crane |
An
extension
of
the
trolley
runway
that
may
be
raised
or
retracted
to
obtain
clearance
for
gantry
travel.
(ASME
B30.2-1990) |
|
Boom (of overhead
cranes)
|
Overhead
Crane |
A
horizontal
member
mounted
on
the
trolley
to
permit
hoisting
and
lowering
the
load
at a
point
other
than
directly
under
the
hoist
drum
or
trolley. (ASME
B30.2-1990) |
|
Box section |
Overhead
Crane |
The
rectangular
cross
section
of
girders,
trucks
or
other
members
enclosed
on
four
sides.
(CMAA
Spec.
70) |
|
Brake |
Overhead
Crane
&
Hoist |
A
device,
other
than
a
motor,
used
for
retarding
or
stopping
motion
by
friction
or
power
means.
(CMAA
Spec.
70) |
|
Brake, Bridge
Crane
Control |
Overhead
Crane
&
Hoist |
A
method
of
Bridge
Crane
Controlling
speed
by
removing
energy
from
the
moving
body
or by
imparting
energy
in
the
opposite
direction.
(ASME
B30-16-1993) |
|
Brake, countertorque
(plugging) |
Hoist |
A
method
of
Bridge
Crane
Control
by
which
the
power
to
the
motor
is
reversed
to
develop
torque
in
the
direction
opposite
to
the
rotation
of
the
motor
using
the
motor
as a
generator,
with
the
energy
being
dissipated
by
resistance.
(ASME
B30-16-1993) |
|
Brake, drag |
Overhead
Crane
&
Hoist |
A
friction
brake
that
provides
a
continuous
retarding
force
having
no
external
Bridge
Crane
Control.
(ASME
B30-17) |
|
Brake, dynamic |
Hoist |
A
method
of
Bridge
Crane
Controlling
speed
by
block,
load
the
assembly
of
hook
or
shackle,
swivel.
bearing,
sheaves,
sprockets.
pins,
and
frame
suspended
by
the
hoisting
rope
or
load
chain.
This
shall
include
any
appurtenances
reeved
in
the
hoisting
rope
or
load
chain.
(ASME
B30-16-1993) |
|
Brake, eddy current |
Overhead
Crane
&
Hoist |
A
method
of
Bridge
Crane
Controlling
or
reducing
speed
by
means
of an
Bridge
Crane
Electrical
induction
load
brake.
(ASME
B30-17) |
|
Brake, emergency |
Overhead
Crane |
A
method
of
decelerating
a
drive
when
power
is
not
available.
The
braking
effort
may
be
established
as a
result
of
action
by
the
operator,
or
automatically
when
power
to
the
drive
is
interrupted.(ASME
B30-17) |
|
Brake, holding |
Overhead
Crane
&
Hoist |
A
friction
brake
for a
hoist
that
is
automatically
applied
and
prevents
motion
when
power
to
the
brake
is
off.
(ASME
B30.2-1990) |
|
Brake, hydraulic |
Overhead
Crane |
A
method
of
Bridge
Crane
Controlling
or
reducing
speed
by
means
of
displacement
of a
liquid. (ASME
B30-17) |
|
Brake, mechanical |
Overhead
Crane
&
Hoist |
A
method
of
Bridge
Crane
Controlling
or
reducing
speed
by
friction.
(ASME
B30-17) |
|
Brake, mechanical
load |
Hoist |
An
automatic
type
of
friction
brake
used
for
Bridge
Crane
Controlling
loads
in a
lowering
direction.
This
unidirectional
device
requires
torque
from
the
motor
or
hand
chain
wheel
to
lower
a
load
but
does
not
impose
any
additional
load
on
the
motor
or
hand
chain
wheel
when
lifting
a
load.
(ASME
B30-16-1993) |
|
Brake, parking |
Overhead
Crane |
A
brake
for
bridge
and
trolley
that
may
be
automatically
or
manually
applied
to
impede
horizontal
motion
by
restraining
wheel
rotation.
(ASME
B30-17) |
|
Brake, pneumatic |
Overhead
Crane |
A
method
of
Bridge
Crane
Controlling
or
powering
a
drive
or
brake
by
means
of
compressed
gas. (ASME
B30-17) |
|
Brake, regenerative |
Hoist |
A
method
of
Bridge
Crane
Controlling
speed
in
which
the
electrical
energy
generated
by
the
motor
is
fed
back
into
the
power
system.
(ASME
B30-17) |
|
Brake, service |
Overhead
Crane |
A
brake
for
bridge
or
trolley
used
by
the
operator,
during
normal
operation,
to
apply
a
retarding
force.
(ASME
B30.2-1990) |
|
Branch circuit |
Bridge
Crane
Control |
The
circuit
conductors
between
the
final
overcurrent
device
protecting
the
circuit
and
the
outlet(s).
(CMAA
Spec.
70) |
|
Breakaway force |
Below
Hook
Device |
The
external
force
that
is
required
to
separate
the
vacuum
pad
or
vacuum
lifting
device
from
the
load
when
applied
perpendicular
to
the
attachment
surface.
(ASME
B30.20-1985) |
|
Bridge |
Overhead
Crane |
That
part
of an
overhead
crane
consisting
of
girders,
trucks,
end
ties,
walkway
and
drive
mechanism
which
carries
the
trolley
and
travels
in a
direction
parallel
to
the
runway.
(CMAA
Spec.
70) |
|
Bridge (crane)
travel
|
Overhead
Crane |
Crane
movement
in a
direction
parallel
to
the
crane
runway.
(ASME
B30.11-1993) |
|
Bridge conductors |
Overhead
Crane |
The
electrical
conductors
located
along
the
bridge
structure
of a
crane
to
provide
power
to
the
trolley.
(CMAA
Spec.
70) |
|
Bridge crane, top
running |
Overhead
Crane |
|
|
Bridge Crane,
Under
running |
Overhead
Crane |
|
|
Bridge girder
(crane
girder) |
Overhead
Crane |
Crane
member
on
which
carriers
or
trolleys
travel,
horizontally
mounted
between
and
supported
by
the
end
trucks.
Building
Structure.
The
structural
members
of a
building
which
support
the
building
loads
and
on
which
the
loads
of
crane
or
monorail
equipment,
and
the
material
to be
moved,
will
be
imposed.
(ANSI
MH
27.1-1981) |
|
Bridge rail |
Overhead
Crane |
The
rail
supported
by
the
bridge
girders
on
which
the
trolley
travels.
(CMAA
Spec.
70) |
|
Bridge travel |
Overhead
Crane |
The
crane
movement
in a
direction
parallel
to
the
crane
runway.
(ASME
B30.2-1990) |
|
Bumper (buffer) |
Overhead
Crane |
An
energy
absorbing
device
for
reducing
impact
when
a
moving
crane
or
trolley
reaches
the
end
of
its
permitted
travel,
or
when
two
moving
cranes
or
trolleys
come
into
contact.
(CMAA
Spec.
70) |
|
Cab |
Overhead
Crane |
The
operator’s
compartment
on a
crane.
(ASME
B30-17) |
|
Cab Bridge Crane
Controlled |
|
Equipment
Bridge
Crane
Controlled
from
an
operator’s
cab.
(ANSI
MH
27.1-1981) |
|
Cab, normal |
Overhead
Crane |
Operator’s
compartment
used
for
Bridge
Crane
Controlling
a
cab-operated
crane.
(ASME
B30.2-1990) |
|
Cab, skeleton |
Overhead
Crane |
Operator’s
compartment
used
for
occasional
cab
operation
of,
normally,
a
floor-
or
remote-operated
crane
or
carrier.
(ASME
B30.11-1993) |
|
Cab-operated
crane |
Overhead
Crane |
A
crane
Bridge
Crane
Controlled
by an
operator
in a
cab
located
on
the
bridge
or
trolley.
(CMAA
Spec.
70) |
|
Camber |
Overhead
Crane |
The
slight
upward
vertical
curve
given
to
girders
to
compensate
partially
for
deflection
due
to
hook
load
and
weight
of
the
Crane.
(CMAA
Spec.
70) |
|
Cantilever frame |
Overhead
Crane |
A
structural
member
that
supports
the
trolley
of a
wall
crane.
(ASME
B30.2-1990) |
|
Capacity |
General |
The
maximum
rated
load
(in
tons)
which
a
cranes
designed.
to
handle.
(CMAA
Spec.
70) |
|
Carrier (also
known
as
trolley) |
Hoist |
A
unit
that
travels
on
the
bottom
flange
of a
monorail
track,
jib
boom,
or
bridge
girder
to
transport
a
load.
(ASME
B30.11-1993) |
|
Carrier (trolley) |
Overhead
Crane
&
Hoist |
An assembly with wheels which will run on monorail track or crane girders and which will support a load. (ANSI MH 27.1-1981) |